MQ Messaging
(WMQ) messaging products provide an infrastructure for distributed, asynchronous communication of data in a distributed, heterogeneous environment. The WMQ message queue allows you to easily exchange information across platforms.
The MQ extension provides the functionality to exchange messages between databases and WMQ message queues.
You can replicate MQ messages with all types of high-availability clusters. If a secondary server in a cluster is read-only, the non-WMQ data cannot be updated from that server, however the WMQ message data can be updated.